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MQSeries.net Forum Index » General IBM MQ Support » not persistent survives

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ramires
PostPosted: Thu Oct 12, 2006 3:33 am    Post subject: not persistent survives Reply with quote

Knight

Joined: 24 Jun 2001
Posts: 523
Location: Portugal - Lisboa

Hello

Application Programming Reference, says about non-persistence messages:"MQPER_NOT_PERSISTENT The message does not usually survive system failures or queue manager restarts." It seams sometimes non-persistent message are not lost after a qmgr restart. Is this new in v6?

Thanks
ramires
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jefflowrey
PostPosted: Thu Oct 12, 2006 3:36 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

Non-persistent messages will be explicitly discarded when the queue manager starts up.

Unless the NPMCLASS of the queue is configured to prevent this explicit discard from happening.

http://publib.boulder.ibm.com/infocenter/wmqv6/v6r0/index.jsp?topic=/com.ibm.mq.csqzaj.doc/csqzaj1048.htm
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fjb_saper
PostPosted: Thu Oct 12, 2006 3:37 am    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY

Some of the more obscure queue settings make a difference. I believe this was already the case in 5.3.

If you use default settings however non persistent messages will not survive a qmgr restart.

Enjoy
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jefflowrey
PostPosted: Thu Oct 12, 2006 3:43 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

fjb_saper wrote:
Some of the more obscure queue settings make a difference. I believe this was already the case in 5.3.


NPMCLASS was introduced in a CSD of v5.3.
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ramires
PostPosted: Thu Oct 12, 2006 4:05 am    Post subject: Reply with quote

Knight

Joined: 24 Jun 2001
Posts: 523
Location: Portugal - Lisboa

Thanks for your explanations! When I read NPMCLASS I wrongly associated to channels. Not to a queue parameter.

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ramires
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jefflowrey
PostPosted: Thu Oct 12, 2006 4:10 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981

Channels have NPMSPEED. It's kind of NPMCLASS for channels, in a way.
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wschutz
PostPosted: Thu Oct 12, 2006 9:41 am    Post subject: Reply with quote

Jedi Knight

Joined: 02 Jun 2005
Posts: 3316
Location: IBM (retired)

jefflowrey wrote:
fjb_saper wrote:
Some of the more obscure queue settings make a difference. I believe this was already the case in 5.3.


NPMCLASS was introduced in a CSD of v5.3.
CSD 6, to be precise....
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vennela
PostPosted: Thu Oct 12, 2006 10:58 am    Post subject: Reply with quote

Jedi Knight

Joined: 11 Aug 2002
Posts: 4055
Location: Hyderabad, India

wschutz wrote:
jefflowrey wrote:
fjb_saper wrote:
Some of the more obscure queue settings make a difference. I believe this was already the case in 5.3.


NPMCLASS was introduced in a CSD of v5.3.
CSD 6, to be precise....

That used to cause bunch of errors when running saveqmgr
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